test/Transforms/MemCpyOpt/vscale-crashes.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s

; Check that a call featuring a scalable-vector byval argument fed by a memcpy
; doesn't crash the compiler. It previously assumed the byval type's size could
; be represented as a known constant amount.
define void @byval_caller(ptr %P) {
; CHECK-LABEL: @byval_caller(
; CHECK-NEXT:    [[A:%.*]] = alloca i8, align 1
; CHECK-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[A]], ptr align 4 [[P:%.*]], i64 8, i1 false)
; CHECK-NEXT:    call void @byval_callee(ptr byval(<vscale x 1 x i8>) align 1 [[A]])
; CHECK-NEXT:    ret void
;
  %a = alloca i8
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %P, i64 8, i1 false)
  call void @byval_callee(ptr align 1 byval(<vscale x 1 x i8>) %a)
  ret void
}

declare void @llvm.memcpy.p0.p0.i64(ptr align 4, ptr align 4, i64, i1)
declare void @byval_callee(ptr align 1 byval(<vscale x 1 x i8>))

; Check that two scalable-vector stores (overlapping, with a constant offset)
; do not crash the compiler when checked whether or not they can be merged into
; a single memset. There was previously an assumption that the stored values'
; sizes could be represented by a known constant amount.
define void @merge_stores_both_scalable(ptr %ptr) {
; CHECK-LABEL: @merge_stores_both_scalable(
; CHECK-NEXT:    store <vscale x 1 x i8> zeroinitializer, ptr [[PTR:%.*]], align 1
; CHECK-NEXT:    [[PTR_NEXT:%.*]] = getelementptr i8, ptr [[PTR]], i64 1
; CHECK-NEXT:    store <vscale x 1 x i8> zeroinitializer, ptr [[PTR_NEXT]], align 1
; CHECK-NEXT:    ret void
;
  store <vscale x 1 x i8> zeroinitializer, ptr %ptr
  %ptr.next = getelementptr i8, ptr %ptr, i64 1
  store <vscale x 1 x i8> zeroinitializer, ptr %ptr.next
  ret void
}

; As above, but where the base is scalable but the subsequent store(s) are not.
define void @merge_stores_first_scalable(ptr %ptr) {
; CHECK-LABEL: @merge_stores_first_scalable(
; CHECK-NEXT:    store <vscale x 1 x i8> zeroinitializer, ptr [[PTR:%.*]], align 1
; CHECK-NEXT:    [[PTR_NEXT:%.*]] = getelementptr i8, ptr [[PTR]], i64 1
; CHECK-NEXT:    store i8 0, ptr [[PTR_NEXT]], align 1
; CHECK-NEXT:    ret void
;
  store <vscale x 1 x i8> zeroinitializer, ptr %ptr
  %ptr.next = getelementptr i8, ptr %ptr, i64 1
  store i8 zeroinitializer, ptr %ptr.next
  ret void
}

; As above, but where the base is not scalable but the subsequent store(s) are.
define void @merge_stores_second_scalable(ptr %ptr) {
; CHECK-LABEL: @merge_stores_second_scalable(
; CHECK-NEXT:    store i8 0, ptr [[PTR:%.*]], align 1
; CHECK-NEXT:    [[PTR_NEXT:%.*]] = getelementptr i8, ptr [[PTR]], i64 1
; CHECK-NEXT:    store <vscale x 1 x i8> zeroinitializer, ptr [[PTR_NEXT]], align 1
; CHECK-NEXT:    ret void
;
  store i8 zeroinitializer, ptr %ptr
  %ptr.next = getelementptr i8, ptr %ptr, i64 1
  store <vscale x 1 x i8> zeroinitializer, ptr %ptr.next
  ret void
}

; Check that the call-slot optimization doesn't crash when encountering scalable types.
define void @callslotoptzn(<vscale x 4 x float> %val, ptr %out) {
; CHECK-LABEL: @callslotoptzn(
; CHECK-NEXT:    [[ALLOC:%.*]] = alloca <vscale x 4 x float>, align 16
; CHECK-NEXT:    [[IDX:%.*]] = tail call <vscale x 4 x i32> @llvm.experimental.stepvector.nxv4i32()
; CHECK-NEXT:    [[STRIDE:%.*]] = getelementptr inbounds float, ptr [[ALLOC]], <vscale x 4 x i32> [[IDX]]
; CHECK-NEXT:    call void @llvm.masked.scatter.nxv4f32.nxv4p0(<vscale x 4 x float> [[VAL:%.*]], <vscale x 4 x ptr> [[STRIDE]], i32 4, <vscale x 4 x i1> shufflevector (<vscale x 4 x i1> insertelement (<vscale x 4 x i1> poison, i1 true, i32 0), <vscale x 4 x i1> poison, <vscale x 4 x i32> zeroinitializer))
; CHECK-NEXT:    [[LI:%.*]] = load <vscale x 4 x float>, ptr [[ALLOC]], align 4
; CHECK-NEXT:    store <vscale x 4 x float> [[LI]], ptr [[OUT:%.*]], align 4
; CHECK-NEXT:    ret void
;
  %alloc = alloca <vscale x 4 x float>, align 16
  %idx = tail call <vscale x 4 x i32> @llvm.experimental.stepvector.nxv4i32()
  %stride = getelementptr inbounds float, ptr %alloc, <vscale x 4 x i32> %idx
  call void @llvm.masked.scatter.nxv4f32.nxv4p0f32(<vscale x 4 x float> %val, <vscale x 4 x ptr> %stride, i32 4, <vscale x 4 x i1> shufflevector (<vscale x 4 x i1> insertelement (<vscale x 4 x i1> poison, i1 true, i32 0), <vscale x 4 x i1> poison, <vscale x 4 x i32> zeroinitializer))
  %li = load <vscale x 4 x float>, ptr %alloc, align 4
  store <vscale x 4 x float> %li, ptr %out, align 4
  ret void
}

declare <vscale x 4 x i32> @llvm.experimental.stepvector.nxv4i32()
declare void @llvm.masked.scatter.nxv4f32.nxv4p0f32(<vscale x 4 x float> , <vscale x 4 x ptr> , i32, <vscale x 4 x i1>)